The companys leaders in Problem 89 decide for or against certain measures as follows: The president has

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The company’s leaders in Problem 89 decide for or against certain measures as follows: The president has 2 votes and each vice-president has 1 vote. Three favorable votes are needed to pass a measure. List all minimal winning coalitions; that is, list all subsets of {P, V1, V2, V3} that represent exactly 3 votes.


Data in Problem 89

A company president and three vice-presidents, denoted by the set {P, V1, V2, V3}, wish to select a committee of 2 people from among themselves. How many ways can this committee be formed? That is, how many 2-person subsets can be formed from a set of 4 people?  

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